The "How to Activate" directions work. You cannot just activate using the code. You must first bind the pre-code via the DISM info shown in those directions... let the server do its reboots, and then activate with the code you purchased.

Worked like a charm. Thanks!!

Worked perfectly! Exactly what I wanted

This was a kind of a lengthy process on my VM, you really have to read with care and be patient. In the end it worked out!

Read the instructions and you'll be happy. Nice one.